Dog mouth brush



FIG. 1 is a top perspective view of a dog mouth brush;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevation view, the reverse side elevation view being a mirror image thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a rear elevation view thereof. 

CLAIM The ornamental design for a dog mouth brush, as shown and described. 